We'd really appreciate feedback from the wider photography community on something we've built: GetSharp The premise is that we're going to teach you to use your DSLR camera on manual by strongly emphasising the use of 'stops'. You can read more about how we built/designed the app here, if you are interested. We know there are some limitations we don't have zoom and we don't let you change lenses. Whilst we know that these are important parts of photography, it didn't fit into what we thought we could ship and get feedback on (we didn't want to work on something for years and then find out we were doing it all wrong!) We're trying to focusing on teach the affordances and costs of each leg of the exposure triangle (Aperture, ISO and SS) and how you can push and pull each leg for effect whilst maintaining control of the exposure levels because you're functioning in stops. We're keen for feedback!